Year	current US$
1995	4135000000
1996	3723000000
1997	3773000000
1998	6188000000
1999	8786000000
2000	9221000000
2001	9158000000
2002	9916000000
2003	10776000000
2004	12721000000
2005	13336000000
2006	14409000000
2007	15546000000
2008	17438000000
2009	14691000000
2010	12478000000
2011	14813000000
2012	13210000000
2013	16084000000
2014	17820000000
2015	15665000000
2016	14727000000
2017	16875000000
2018	18821000000
2019	20276000000
2020	5015000000